Puncture-proof composition and process of making the same



Patented den. 24, 1928.. l i

lotion or rrrnnnrounrns IrlllItI-ZENGTOH, or .lncia ron, rrmrru a I nczrr.

TOEHEINEEZt S. MASON, F KEN Puncrunnrnoor conrrosrrron nn TELtZOG" on marine. sat/m.

No Drawing". Application filed October 5, 1926. Serial No. 139,761.

'lhir invention relates to a composition son of my special process, it jams into an especially adapted for preventing leakage air-tight dam or plugthat prohibits the of air from a puncture of an inner automoescape of air, thus sustaining inflation and bile tube. eiiiciency is in immediately enabling the car to continue until a'convenb ca ging en masse the wall of a puncture lent time or place is reached for patching hole made in the tire while in action and prethe tube. l further claim that by inserting venting the escape oi air, thus holding the this product into a punctured tube the same tire, up from deflation for an indefinite can then be pumped up and run indefinitely period, without patching. The powder must be ap- 1c in preparing my compound l min silica in plied in its perfectly dry form without use a timely divided term which is or may be oi? liquid or viscous matter. 7

gathered from a private source (and I belVhile my composition above described is lieve is marketed undcrthe name of silex), Jll'llJOSBLl ot a plurality of different powand alumina, tine mica and soapstone, each each oi them has a distinct function in body divided form, in the following Oiii a special value in connection with punc- ,parts or proportions respectively, d0, 30, tiuc- 'iroolin5;- .alities. The silica by reason 10, 10, (it its sharp r gore and irregular shapes of l intimately mi these sev ral ingredients lit-3 minute particles gives it a critical quality in the proportions noted until they are uniot' jamming and forming non-slippin o lormly commingled. lhen I mix them to well which intcrpenetrates the punctured a creamy mass in water and pour the mixtire talnric. 'lhealumina by reason of its turc into a deep vatwith sides extending non-absorbent, soft and extremely fine texsevcral inches above the contained menturc lills the smaller interstices in the puncstruum and place the metalliccontainer on ture. The mica by reason of its laminate a hot lire with a loose cover to permit the form being flexible and elastic gives coverescape of steam. ll continue the boiling age and bulk tothe other forms preventing process until all the water is expelled, the their blowing through the puncture. The linal effect of the escaping steam at or near soapstone by reason oi its anti-friction qualithe closing of the operation being to cause ties causes the other ingredients to be so the mass to fiult' up into a very porous or brought into closer molecular relation and tlocculent consistency. The mass is then readily permits the propulsion of the other allowed to cool, when it is broken up into materials throughout the wall of the tube to powder form through a sieve of about 100 enter and seal the puncture. mesh to the inch. The container is also The aggregate of my composition forms 35 dumped of fragments and dust, which is an ellicient creepy masswhich under presalso put through the sieve. The sieved sure wedges into an airtight dam or plug product is mixed with a coarser powdered particularly eilicient against leakage of air. mica and stirred until a uniform mixture While I have herein described my comporesults. If desired, for the purpose of a sition and method of preparing same, I

4.0 disguise a small quantity of ocher and gilt would have it understood that I do not limit dust may be added. It is then prepared tor myself to the specific proportions recited, I the market in suitable cartons. but that the same may be varied within In using the composition the valve stem limits without departing from the efliciency of the inner tube is removed and the finof my compound.

45 ished product introduced, preferably 2 Having thus described my invention, what ounces for a 301135 or 3 inch tube, and 4; I claim as new and desire to secure by Letto 6 ounces for a balloon tire. The valve is ters Patent is:

then replaced and mounted on the wheel, 1. A puncture-proof composition containand when the wheel is put into action the ing a dehydrated mixture of finely divided 50 composition is distributed centrifugally silica and alumina in major proportion and throughout the tube and is carried by leak mica and soapstone in minor proportion, incurrents to the point where leak is, nd timately commingled and in fine powdered where, by reason of the peculiar formations form.

of the contributing elements in the composi- 2. A puncture-proott composition containticn and the consistency of the same by reaing a dehydrated mixture of finely divided 10 silica and alumina in major proportion and mica and soapstonein minor proportion, and a small proportion of coarsely ground mica intimately commingled.

3. A. puricture proof composition consisting of a dehydratod mixture of forty parts' silica, thirty parts alumina, ten parts each of fine mlca and soapstone and a portlon of coarse mlca.

4. The process of makim a punctureproof composition for automo 11o tlres, consisting in making an intimate mixture of silica'and alumina in major proportions and mica and soapstone in minor proportions, 'mixing to a uniform"conxisteucy with Water,

boiling dry, and reducing to :1 fine pow- BERT G. HARRINGTON.

dared form. 

